Because we are using language to describe something. If the words are meaningless we don't have a language. We have marketingspeak, we have politclexicon, we have conpatter.

If you want to extol the virtues of Django Rheinhardt (and if not - why not?) you have to say what it is, why call it music when sound or noise would do?

tell 'em Django is "Hot Club de France" and if they ask again expand the definition. By including Swing Jazz and Gyspy music - and Folk is in there.

Many years ago I was bought a record of Django without Stephane playing on it and that was billed as Folk not Jazz. I even sought-out the recording of Django with the Glenn Miller Orchestra - was that Jazz? Was it a military WWII band sans the eponomous leader? Well, describing it as pure Django is a start, and not far off as descriptions go.

It matters because we are communicating. Labels is simply shorthand for communication.

Those that think it doesn't matter - let them think, but please - don't let them communicate to me, I speak English.